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Nexperia USA Inc. BZX384-C15-QX
- Part No.:
- BZX384-C15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C15-QX.pdf
- Description:
- DIODE ZENER 14.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,238
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Product details
Overview
BZX384-C15-QX from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 15 V nominal breakdown at 5 mA, with 300 mW total power dissipation and qualified to AEC-Q101 for automotive power rail stabilization and overvoltage protection.
For engineers reviewing the BZX384-C15-QX datasheet, BZX384-C15-QX pinout, BZX384-C15-QX application, or BZX384-C15-QX equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse leakage, and thermal resistance data directly tied to automotive-grade reliability and PCB-level regulation design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 15 V nominal Zener voltage is specified at IZ = 5 mA, with a typical differential resistance of 200 Ω and temperature coefficient of +10.5 mV/K, indicating positive drift with rising junction temperature.
The device supports non-repetitive surge handling up to 40 W for 100 μs pulses and is mounted on FR4 PCB with single-sided copper, delivering Rth(j-a) = 415 K/W and Rth(j-sp) = 110 K/W for thermal management in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V to 15.6 V at IZ = 5 mA - defines regulation window for 15 V nominal rail clamping |
| Differential Resistance (rdif) | 200 Ω max - determines output impedance and load regulation error under current variation |
| Reverse Current (IR) | 30 μA max at VR = 12 V - sets minimum bias current requirement for reliable turn-on |
| Temperature Coefficient (SZ) | +10.5 mV/K - quantifies voltage drift per degree rise in junction temperature |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous DC power in standard PCB mounting |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables transient overvoltage suppression without failure |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 2.3 mm × 1.35 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark indicates cathode side for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±5 % Zener tolerance (C-series) | Cost-optimized precision for non-critical voltage references where tight regulation is not required |
| Low-profile SOD323 package | Enables high-density PCB layouts in space-constrained modules such as ADAS sensors and infotainment power supplies |
| 40 W surge capability | Withstands ISO 7637-2 pulse 1/2a/3a transients without degradation in automotive 12 V systems |
| 150 °C maximum junction temperature | Ensures functional stability in under-dash and powertrain-mounted electronics with minimal heatsinking |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Reference Stabilization |
|---|---|
|
Use Scenario: Protecting microcontroller supply rails in engine control units from load dump transients. IC Role / Device Role / Timing Role: Zener clamp placed between 12 V input and ground to limit peak voltage to ≤15.6 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents MCU brown-out or latch-up by holding rail within safe operating range without active circuitry. |
Use Scenario: Providing stable 15 V reference for analog front-end amplifiers in industrial pressure transducers. IC Role / Device Role / Timing Role: Passive voltage reference source for op-amp biasing and ADC reference scaling circuits. Use Value: Delivers <1 % regulation error across −40 °C to +125 °C ambient due to known +10.5 mV/K TC and low rdif. |
| USB-C Port Overvoltage Protection | Consumer Appliance Power Sequencing |
|
Use Scenario: Safeguarding USB-C PD controller ICs against accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Fast-acting shunt element that conducts above 15.6 V to divert excess current to ground before damage occurs. Use Value: Achieves sub-100 ns response to overvoltage with 40 W surge rating, eliminating need for TVS diodes in cost-sensitive designs. |
Use Scenario: Enabling controlled power-up sequencing in smart home appliances using discrete logic reset generators. IC Role / Device Role / Timing Role: Voltage threshold detector triggering POR (power-on reset) signal when 15 V rail reaches regulation. Use Value: Provides deterministic turn-on point with 30 μA max leakage at 12 V, ensuring clean reset assertion without external comparators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B15-Q | ±2 % tolerance (14.7–15.3 V), lower rdif (150 Ω max), same package and surge rating | Better regulation accuracy for feedback loops requiring tighter VZ stability | Select when ±2 % tolerance justifies higher unit cost and improved thermal coefficient consistency |
| MMSZ5245B-TP | ±5 % tolerance (14.25–15.75 V), 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Higher power handling but lacks automotive qualification and has larger footprint | Choose only for non-automotive industrial use where board space and qualification are secondary to power margin |
Compared with BZX384-B15-Q, the C15-QX trades regulation accuracy for cost and remains AEC-Q101 qualified; versus MMSZ5245B-TP, it offers smaller size and automotive compliance at lower continuous power, making it optimal for space-constrained automotive modules.
Availability
BZX384-C15-QX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor reference, and consumer appliance power sequencing requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-C15-QX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation in harsh automotive environments and industrial power systems.
FAQ
What is the maximum continuous reverse current the BZX384-C15-QX can sustain at 25 °C?
The device is rated for continuous operation at up to 250 mA forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation: at 25 °C ambient and 15 V Zener voltage, the absolute maximum DC reverse current is 20 mA (300 mW ÷ 15 V), assuming no additional thermal derating from PCB layout.
How does the +10.5 mV/K temperature coefficient affect regulation in a 125 °C under-hood environment?
At 125 °C junction temperature, the Zener voltage increases by approximately +1.05 V relative to 25 °C (ΔT = 100 K × 10.5 mV/K), shifting the nominal 15 V regulation point to ~16.05 V - a predictable, linear drift used in temperature-compensated reference designs.
Can BZX384-C15-QX replace BZX384-C12-Q in an existing design without layout changes?
Yes - both share identical SOD323 package, pinout, thermal characteristics, and AEC-Q101 qualification; however, the 15 V version exhibits higher differential resistance (200 Ω vs. 150 Ω for C12-Q) and slightly greater temperature coefficient, which may impact regulation accuracy in high-precision feedback paths.
Is the marking code 'DD' confirmed for BZX384-C15-QX per Nexperia documentation?
Yes - Table 4 of the official datasheet explicitly lists 'DD' as the marking code for BZX384-C15-Q, applied as a laser-etched identifier on the cathode-side surface of the SOD323 package for automated optical inspection and traceability.
BZX384-C15-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C15-QX FAQ
1.How can I place an order for BZX384-C15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C15-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX384-C15-QX reliable?
The price and inventory of BZX384-C15-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C15-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C15-QX?
BZX384-C15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C15-QX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX384-C15-QX?
For technical support, including BZX384-C15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C15-QX requirements.
6.How does Aetrix verify that BZX384-C15-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C15-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX384-C15-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C15-QX?
All BZX384-C15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C15-QX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX384-C15-QX part is unused and in its original packaging.
Return procedure for BZX384-C15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C15-QX Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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